Do progressiverelaxation; tighten each muscle for a count of ten and then release.
放松要循序渐进，在保持肌肉紧张的同时，数十下，然后放松。
2
Objective To explore the effect of progressiverelaxation training on asthma in school age children.
目的探讨渐进式放松疗法对学龄儿童哮喘的治疗效果。
3
It's called progressiverelaxation and it works like this: Starting with your toes and working your way up, clench each muscle for 10 seconds, then thoroughly relax them.